All controlled experiments would have only one variable. If there were more than one variable the outcome of your experiment could be for multiple reasons and thus you would not be able to test whether your specific hypothesis was valid.
<span>Distal sesamoid bone is
closer to the hoof than the proximal sesamoid bone. </span>
If the active site of an enzyme is damaged, leaving it nonfunctional, the reaction proceeds as if it were a non-catalyzed reaction without a lowering of the activation energy.
<h3>What is the active site of an enzyme?</h3>
An active site of an enzyme is the site in an enzyme which the substrate molecules binds to in order for the enzyme to perform its function.
The effective binding of substrate to active site of an enzyme enables catalysis to occur.
Thus, when the active site of an enzyme is damaged, the enzyme becomes non-functional.
Based on the graph, the reaction proceeds as if it were a non-catalyzed reaction without a lowering of the activation energy as seen in the purple colored graph.
In conclusion, effective bonding of substrate to enzyme active site is essential for catalysis to occur.
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Ventilation maintains a steep concentration gradient, blood at the exchange surface usually has lower O2 and higher CO2 content than the air (of for fish, the water) at the exchange surface. This is what allows for diffusion of O2 into the blood and CO2 out of the blood. Multicellular organisms have a greater number of cells so will have a higher energy demand than single cellular organisms, this demand can only be met by allowing the cells to respire, a ventilation system brings oxygen molecules which are a raw product of respiration into the hemoglobin of the blood to be transported to tissues. As surface area : volume ratio is very low so if there was no ventilation system and the organism instead relied on exchange of materials through the exposed skin it would be very difficult to met the high energy demand as less O2 and CO2 would be able to be exchanged.
